Benjamin f



(Nb Model.)

B. F. HALL.

METALLIC PIVOT FOR WINDOW BLIND SLATS. No. 279,379. Patented June12,1883.

I UNITED STATES PATENT OFFICE.

- BENJAMIN F. HALL, OF LANSING, MICHIGAN, ASSIGNOR OF ONE-THIRD 'TOSTEPHEN B. CARR, OF SAME PLACE.

METALLIC PIVOT FOR WINDOW-BLIND SLATS.

SPECIFICATION forming part of Letters Patent No. 279,379, dated June 12,1883.

- Application filed March 16, 18835010 model.)

' To all whom it may concern Be itknown that I, BENJAMIN F. HALL, acitizen of the United States, residing at Lansing, in the county ofIngham and State of Michigan, have invented certain new and usefulImprovements in Metallic Pivots for Window-Blind Slats; and I do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, and to the letters or figures of reference markedthereon, which form a part of this specification.

This invention relates to improvements in that class of window-blinds inwhich the slats are made to revolve on pivots; and the in ventionconsists in a metallic tenon having conical ends for insertion into. thestile and slat, and adapted to serve as a pivot for the slat, ashereinafter more fully set forth.

In the annexed drawings, illustrating my invention, Figure l'representsin side elevation a portion of a window-blind with my improved tenons orslat-pivots applied to a blindstile. Fig. 2 represents the inner side ofa blind-stile with my improved slat-pivots attached. Fig. 3 shows aseries of slats attached to the slat-rod and having metallic socketsinserted into their ends for the reception of the pivots that areattached to the stile. Fig. 4 is a sectional view of stile and slat withmetallic pivot. Fig. 5- is a similar view, showing one end of the pivotinserted into a socket in the end of the slat. Fig. 6 is aview of myimproved slat-pivot.

Like letters designate like parts.

The pivots of revolving blind-slats are usually made in one piece withsaid slats, the manufacture of which thus involves considerable waste oftime and material. That has been overcome, however, by the employment ofmetallic tenons or pivots attached to the ends of the slats andjournaled in the'stiles. Heretofore such metallic pivots or tenons havebeen attached generally to the slats, and have been made. in variousforms differing from that embodied in my improved tenon or slatpivot.

It is obvious that when a metallic tenon is attached to a blind-slat itmust be inserted into the end of the slat in the direction of the grainof the wood, which renders it liable to weaken and split the slat. Thisdifficulty is obviated by inserting the longer end of the pivot into thestile, leaving its shorter portion or head to engage a small depressionor recess in the end of the slat, thereby supporting the slat so that itcan be turned to any desired position without injury.

To this end my improved slat-pivot consists of a metallic tenon, A,formed with conical ends a b, and a disk portion, 0, arranged near oneof i said ends. When using this tenon as a pivot for a blind-slat thelong conical end a is inserted into the stile B, with the collar orwasher 0 bearing against the surface of thestile, leaving the shortconical end or head I) to project and serve as a pivot for the slat. Thelonger end, a, of the tenon may be formed as a nail to-be driven intothe stile, or it may be screw- .threaded, so as to be readily turnedinto its place. The shorter or journal end, Z), of the tenon may beloosely fitted into a small conical depression or recess formed in theend of the slat C for its reception, or said recess may be provided witha metallic socket, d, so that the slat may be turned freely withoutliability of wear or other injury. The sockets d are not essential,however, and may be dispensed with, if desired.

Cylindrical tenons for blind-slats have been surrounded with washersthat are placed on the tenon between the stile and the end of the slat;but this I do not claim.

It is obvious that the tenons may be i11- serted into the slats insteadof into the stiles;

but, for reasons before stated, I prefer to se-.

cure them to the stiles. These metallic tenons or slat-pivots can bereadily and cheaply applied, either in the construction of new blinds orthe repair of old ones, and will be found durable and efiicient. V

Having thus described my invention, what I slats 0, provided withsockets d, substantially as described. 10

In testimony whereof I affix my signature 1n claim as ne 3 and desire tosecure by Letters Patent, is

1. A metallic tenon having conical ends a I) and washer 0 and adapted toserve as a pivot i presence of two witnesses. 5 for a blindslatsubstantially as described.

2. In window-blind, the combination, with l W'itnesses: the stiles B 13,having metallic tenons A, pro- BERNARD KELLY,

T. M. ALsDoRF.

.BENJAMIN F. HALL.

vided with conical heads I), of the movable

